Combined door-lock mechanism and burglar alarm



Aug.' 16, 1927.

G- JAKOPEC ET AL COMBINED DOOR LOCK MECHANISM AND BURGLAR ALARM Filed April 1.. 1926 4 Sheets-Sheet 1 v 1,639,565 1927' H G. JAKOPEC ET AL COMBINED DOOR LOCK MECHANISM AND BURGLAR ALARM Filed April 1. l2 6 4 Sheets-Sheet 2 v 1,639 65 A 9 G. JAKOPEC' ET AL. I

COMBINED DOOR LOCK MECHANISM AMD BURGLAR ALARM Filed April 1. 926 4 Sheets-Sheet 3 gwuewtoz V. Schwu 'g GLJAKOPEC ET AL COMBINED DOOR LOCK MECHANISM AND BURGLAR ALARM Filed April 1. 1926 4 sh ts-sheet 4 llillllll! umnnu I ll!!! A g I J INVENTOR 3 Takopec.

Patented Aug. 16, 1927.

E'FATELS GEORGE JAKOP EC AND VINCENT SCHW'ARZ, OF CHICAGO, ILLINOIS.

COMBINED DOOR-LOCK MECHANISM AND BURGLAR ALARM.

Application filed April 1, 1926.

This invention relates to certain new and useful improvements in combined door lock mechanism and burglar alarm, wherein the operation of a movable partof a door lock mechanism, s ch as a sliding bolt automatically shifts into operative position, a device for releasing alarm mechanism.

A further object of the invention is to provide door lock mechanism and burglar i alarm of the type above set fortl wherein the operating device for the burglar alarr may be shifted to its operative position independently of the door lock mechanism.

Withthe above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists of the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference characters designate corresponding parts throughout the several views, I

Figure 1 fragmentarily illustrates in elevation, a door and door frame with the com bined door locking mechanism and burglar alarm device supported thereon, the operating means for the burglar alarm being illustrated by dotted lines in its operative position,

Figure 2 is a top plan view of the door lock mechanism with the casing cover removed and showing the two bolts in their retracted positions,

Figure 3 is a plan view similar to Fig. 2 showing both bolts in their projected locking positions,

Figure 4 is an enlarged fragmentary plan view of a part of the lock mechanism showing the connection between a part of the lock mechanism and the operating means for the burglar alarm,

Figure 5 is a detail sectional iew taken on line 5-5 of Fig. 1 showing the cartridge support and firing pin of the burglar alarm device,

Figure 6 is a detail sectional View taken on line 6-6 of Fig. 1,

Figure 7 is a fragmentary plan view showing the inner face of the door with the lock casing removed,

Figure 8 is a detail sectional view taken on line 88 of Fig. 1 showing the manner of securing the lock casing and outer, face plate to the door,

Serial No. 99,144.

Figure 9 is a detail sectional view taken on line 99 of Fig. 2,

Figure 10 is an end elevational view of one of the bolts,

Figure 11 is a detail sectional View through the lock casing,

Figures 12 and 13 show reversed perspectie views of the curved link connecting the d ng bolt to the operating arm, Figures 14: and 15 show top plan views of the connecting link and the key operated means therefor with the link in projected retracted positions,

Figure 16 is a detail sectional view showing the mounting for the arm to which one end of the connecting link is pivotally attached, and i Figure 17 is a perspective view of the operating arm for the connecting link.

Referring mor in detail to the accompanying drawings and particularly to Fig. 1, there is illustrated a combined door lock mechanism and burglar alarm associated with the door 1 and door frame 2, the lock casing 3 being secured to the door 1 while the keeper casing 4 is secured to the door frame 2. A burglar alarm device 5 is carried by the door frame 2 at a point spaced from the lock mechanism and embodies a latch arm 6 terminating adjacent the meeting edges 7 of the door and door frame and in a position to be operated by the device generally designated by the numeral 8 in Fig. 1 and interposed between the mechanism in the lock casing 3 and the latch arm 6, the device 8 being operated either by the lock mechanism or manually shifted to its operative position.

The lock casing 3 includes a top wall 9, side walls 10 and 11 and a removable bottom wall 12- retained in position by screws or like fastening devices passing therethrough and entering the inwardly directed lugs 13 carried by the side Walls 10, the removable bottom wall being shown in Fig. 9. The lock casing 3 being secured to the inner face of the door 1, the anchoring screws 14 passing through the apertured lugs 15 carried by the lock casing enter the door 1. and are threaded into barrel portions 16 extending into sockets formed in the outer face of the door and carried by the outer face plate 17 as shown in Fig. 8. i

As shown in Figs. 2 and 3, the top wall 9 of the lock casing uponthe inner face thereof is provided with a cross rib 18 substantially midway between the side wall 11 and opposite wall it) so that the siding bolts mounted in the lock casino ride upon this rib and the narrow wally oi the bolt open ings 19 in too side wall 11 to reduce friction incident to the sliding movements of the bolt.

A pair oi parallel sliding bolts 20 and 21 are mounted in the lock casing. an enlarged head 22 being carried by the forward end each bolt, the bolts being supported upon the cross rib 18 with the head orojecting through the openings 3* and 4 respectively oi? the lock and keeper casing as shown in Figs. 3 and The body portion of each bolt at the end thereof opposite the head bifurcated to pi pair of side legs ..3 and 24, the leg 24- be less thickness e i s. 2, 3 and 19 than t i log as shown beveled as with the inner side of the lee at The of each t its run end carries a perpendicula 26 while the body portion oi mediate the ends thereof provided with an opening 27 that is countersunk as illustrated by dotted lines in Fig. for purposes pres-- ently to appear. As shown more cle rly in Figs. 2 and 3, the body portion and head of the bolt 21 is cutaway at one side to provide a shoulder 28 that in the path of movement of the laterally directed arm 29 carried by the adjacent side of the bolt 20.

The operating means for the bolt in eludes the knob 30 carried by the spindle 31 that is swiveled iu the bearing block carried by the bottom wall 9 of the lock casing shown in Fig. 11 with the inner end thereof projecting inwardly of the bearin block 32 carrying the polygonal block 33 shown in Figs. and 3. The arm shown in detail in 1? is provided with a polygonal opening in one end thereof that receives the block 33 while the opposite end of said arm is provided with a circular opening 36 surrounded by an upstanding flange 37.

The connecting link 38 shown in 2, l2 and 13 forms communication between do operating arm and the bolt 20. said i k being; or arcuate formation illusrated ar l having upon is lower face as llustrated in Fig. 13 with a disk block a centrally disposed pin 40 surias base by the circular flange 41, and flange 41 being received in the countersunk opening in the body portion 20 of the bolt. This block 39 rests upon the adjacent face of the bolt and removes the major suri'ace of the connecting link from wiping engagement with the bolt. A disk block 42 is carried by the outer end of the connecting link and said block 42 carries upon its lower face a central pin 43 that is received in the opening 36 in the free swing- ,ees

ing end of the operating arm 84, the circular flange or bo s 37 surrounding the opening 36 spacing the connecting link from the operating arm. As shown in Fig. 12 the end of the curved connecting link 38 adjacent the disk block 39 upon the opposite :t'ace o'l said link there is provided a pair of spaced pins 44 while the other end of the connecting link aljacent the block 42 is provided with a block 45 the pins and block engaging the removable walls 12 oil the lock casing for retaining the connecting links in position in the lock casing. The relative positions of the bolt 20, operating arm 34 and connecting link 38 are shown in Figs. 2 11 and 16, the knob 30 in operating the arm 34 moving the same over the leg 24 of the bolt while the leg 2-3 oi the bolt being in the path oi movement of the operating arm 34 as shown n T 3 and 16, limiting movement of the operating arm in 1ts movement "for pro ecting the bolt 20. For purposes presently to appear. the disk block 42 carries an upwardly directed annular flange 46 having an opening 47 in the side Wall thereof as shown in Fig. 12.

The bolt 20 being operable from the inner side of the door 1 as shown in Fig. 1 by the knob 30 key operated mechanism carried by the outer side of the door is employed for operating the bolt and the key operated mechanism is shown in detail in Figs. 9, 14 and 15. As shown in Fig. 9. the outer face plate 17 oi the lock casing structure carries a key barrel casing 48 set into the opening 49 provided in the door 1 with a blade 50 carried by the barrel casing 48 and rotatably by a key projects through the central. openin 51 formed in the face plate 52 that is set into the inner face of the door 1 inwardly of the lock casing as shown in Figs. 7 and A flanged cup-shaped member 53 is rotatably supported in the rem'ovable walls 12 of the lock casing and has a slot 54 in the bottom wall thereof through which the blade 50 freely projects, that end of the cup-shaped member 53 within the lock casing having a lever arm 55 fixed thereto with a laterally directed lug 56 carried by the free swinging end thereof. The blade being rotated by a key placed within the lock barrel casing 48, the lever arm 55 is moved to shift the lug 56 through the side opening 17 in the annular flange 46 of the block 42 upon the connecting link 38 for moving the connecting link and in turn the bolt 20 connected thereto. The bolt 20 may be operated from the inner side of the door by the knob 30 and also projected and re tracted from the outer side of the door by operating the lock barrel blade 50.

The sliding bolt 21 constituting a secondary l ck is operable only from t ie outer side of the door, and as shown in Fig. 16, the bottom wall 9 of the lock casing 3 carries a of the door. The sliding bolt 21 being operable only from the outer side of the door, the connecting devices 8 interposed between the burglar alarm device and the lock mechanism is associated with the curved connecting link 353 for the bolt 21 for automaticall moving the burglar alarm device to its set position when the bolt 21 is moved to its projected position from the outer side of the door in a manner to be now described.

The connecting link carries a laterally projecting cam wall 59 on the outer edge thereof adjacent the upper sidewall of the lock casing with rack teeth 60 on the ou-..er edge of the cam wall. The mechanism 8 includes a lever 61 pivotally mounted intermediate its ends as at 62 upon the door 1 vith a link 63 connected as at 64 to one end of said lever and being pivotally connected at its other end as at 65 to a rack segment 66 that is pivoted as at 67 upon the door 1. The teeth of the rack segment project through the slotted opening 68 in the upper side wall of the lock casing as shown in Fig. 4 for engagement with the segment teeth 60 upon the cam segment 59, the projection of the bolt 21 by the connecting link 38 shifting the rack segment 66 upon its pivot 67 and through the link connection 63 with the arm 61 operates the latter to project the free end of the lever arm 61 to a position overlying the meeting edges 7 between the door 1 and frame 2 as shown in Fig. 1 by dotted lines.

With the lever arm 61 so positioned as illustrated in Figs. 1 and 6 the free end thereof overlying the meeting edges of the door and frame is disposed beneath the free end of the latch arm 6 ot. the burglar alarm device, movement of the latch arm 6 in a direction toward the door frame being limited by the stop 69 to insure the passage of the lever arm 61 beneath the latch. arm 6. The burglar alarm device includes a bracket plate 70 secured to the door frame and as shown more clearly in Figs. 1 and 5 includes abarrel portion 71 housing a firing pin 72 that is spring pressed as at 73 and retained in its retracted set position against the tension of the spring by the latch arm 6 pivoted as at 7% to the barrel 71 and having a side portion passing through the slot 75 in the barrel to enter the side notch 76 in the firing pin 72. The lower end of the bracket plate 70 carries a tubular support or breech 77 alined with the barrel and firing pin for receiving a blank cartridge 8. It wilhtheretore, be

seen that with the firing pin 72 retracted as shown in Fig. 5 and so retained by the latch arm 6, opening movement of the door 1 when, the lever arm 61 is in the dotted line position shown in Fig. 1 will shi t the latch arm 6 to free the firing pin 72 and lire the cartridge 78.

From the above detail description of the device, it is believed that the construction and operation thereof will at once be apparent, it being noted that the sliding bolt 20 is operable from either side of the door by either the knob 30 or a key inserted in the lock barrel 18 at the outer side of the door as will at once he understood from an inspee tion of Figs. 9, 14 and 15, while the burglar alarm device may be manually set from the inner side of the door by shifting the connecting devices 8 positioned between the burglar alarm device and the lock mechanism. The burglar alarm device is also set from the outer side of the door upon operatthe sliding bolt 21.

While there is herein shown and described the preferred embodiment of the present in vention, it is nevertheless, to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What is claimed is 1. In a combined door lock mechanism and burglar alarm, a lock mechanism comprising a sliding bolt, a burglar alarm device, mechanism interposed between the alarm device and sliding bolt adapted to be automatically moved to alarm operating position upon locking projection of the bolt, operating means for said bolt including a cam rack pivoted on said bolt, means for moving the cam rack to slide the bolt, a rack segment constituting a part of the mecha nism and adapted to be engaged by the cam rack, and a lever arm for operating the burglar alarm shifted to operative position by the rack segment.

2. In a combined door lock mechanism burglar alarm, a lock mechanism comprising a sliding bolt, a. burglar alarm device, mechanism interposed between the alarm device and sliding bolt adapted to be automatically moved to alarm operating position upon locking projection of the bolt, operating means for said bolt including a. cam rack pivoted on said bolt, means for moving the cam rack to slide the bolt, a rack segment constituting a part of the mechanism and adapted to be engaged by the cam rack, the cam rack and rack segment being normally disengaged to permit manual operation of the rack se ment for positioning the mechanism in its operative position, and a lever arm for operating the burglar alarm shifted to operative position by the rack segment.

3. In a combined door lock and burglar alarm, a lock mechanism comprising a slidin bolt. a burglar alarm device, mechanism interposed between the alarm device and sliding bolt adapted to be automatically moved to alarm operating position upon locking projection of the bolt, a cam rack forming a part of the operating means for the bolt, the mechanism including a rack segment adapted to be engaged and operated by the cam rack during locking projection of the bolt, and lever and link devices operated by said rack segment to be shifted to operative position relative to the alarm device.

a. In a combined door lock and burglar alarm, a lock mechanism comprising a sliding bolt, a burglar alarm device, mechanism interposed between the alarm device and sliding bolt adapted to be automatically moved to alarm operating position upon locking projection of the bolt, a cam rack forming a part of the operating means for the bolt, the mechanism including a rack segment adapted to be engaged and operated by the cam rack during locking projection of the bolt, a lever pivotally supported on the door and a link connecting the rack segment and lever for moving the lever to op erative position relative to the alarm device upon projection of the bolt and operation of the rack segment.

5. In a combined door lock and burglar alarm, a lock mechanism comprising a sliding bolt, operating means for the bolt including a cam rack, a burglar alarm device, mechanism interposed between the alarm device and cam rack adapted to be automatically moved to alarm operating position upon locking projection of the bolt, said mechanism being normally spaced from the cam rack and manually operable for movement into operative position and said mechanism being engaged by a part or" the cam rack for automatic movement into operative position upon locking projection of the bolt.

In testimony whereof We afiix our signatures.

GEORGE JAKOPEC. VINCENT SCHWVARZ. 

